Daniel Patrick O'Day

CEO · GILEAD SCIENCES, INC.

Rank #1,192 SEC EDGAR (United States) ↗ Files from United States

Details

Officer and board memberPharmaceuticals & BiotechnologyUnited StatesBorn May 26, 1964 · age 62Columbia UniversityGeorgetown UniversityGILDSEC CIK 0001638643

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Disclosed holdings
$97.0M
1-day change
▼ 0.15%
Positions on file
1
issuers disclosed in Forms 3/4/5 and Schedules 13D/G

Disclosed holdings over time 53 weekly points

What the 1 currently disclosed position would have been worth at each week’s closing price. A rising line means the shares got more valuable, not that this person bought more.

How the line is built

Share counts are as last reported to the SEC and held constant; only prices move.

2025-09-05$72.0M – $99.6M2026-09-04

Insider activity Jun 10, 2024 – Mar 27, 2026

Daniel Patrick O'Day is recorded in filings to the U.S. SEC via EDGAR as officer and board member, and reported 46 transactions between Jun 10, 2024 and Mar 27, 2026. The buy and sell totals below count only codes P, S.

Why the other codes are excluded

Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.

Open-market buys (code P)
None
0 purchases on file
Open-market sales (code S)
$46.48M
22 sales on file priced rows only
All reported transactions
46
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

Daniel Patrick O'Day sold 115,640 GILEAD SCIENCES, INC. (GILD) shares for $17,346,000 on Feb 5, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Daniel Patrick O'Day sold 115,640 GILEAD SCIENCES, INC. (GILD) shares for $17,346,000 on Feb 5, 2026
Date Insider Transaction Shares Price Value Filing
Feb 5, 2026 Daniel Patrick O'Day S Open-market sale 115,640 held after: 613,912 $150.00 $17,346,000 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Daniel Patrick O'Day sold 115,640 GILEAD SCIENCES, INC. (GILD) shares for $15,611,400 on Jan 23, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Daniel Patrick O'Day sold 115,640 GILEAD SCIENCES, INC. (GILD) shares for $15,611,400 on Jan 23, 2026
Date Insider Transaction Shares Price Value Filing
Jan 23, 2026 Daniel Patrick O'Day S Open-market sale 115,640 held after: 566,698 $135.00 $15,611,400 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Reported transactions

Price 0.00 is a real reported figure on gifts (G) and share awards (A) — not a missing number. The 25 most recent rows are grouped into 15 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 63 on file in total. See the full history on EDGAR ↗

How to read this list

Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.

The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.

  1. GILEAD SCIENCES, INC. GILD F Shares withheld for taxesnot a buy/sell decision 4,230 shares $612.5K at $144.81 SEC filing ↗
  2. GILEAD SCIENCES, INC. GILD M Option exercise or conversionnot a buy/sell decisionreported at zero 8,780 shares $0 at $0.00 SEC filing ↗
  3. GILEAD SCIENCES, INC. GILD S Open-market sale × 3 15,000 shares $2.23M
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    5,408 $149.38 $807.8K SEC filing ↗
    7,992 $148.36 $1.19M SEC filing ↗
    1,600 $147.51 $236.0K SEC filing ↗
  4. GILEAD SCIENCES, INC. GILD S Open-market sale × 3 15,000 shares $1.95M
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    600 $131.34 $78.8K SEC filing ↗
    7,700 $130.80 $1.01M SEC filing ↗
    6,700 $129.66 $868.7K SEC filing ↗
  5. GILEAD SCIENCES, INC. GILD S Open-market sale × 2 15,000 shares $1.89M
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    3,100 $127.08 $393.9K SEC filing ↗
    11,900 $126.09 $1.50M SEC filing ↗
  6. GILEAD SCIENCES, INC. GILD F Shares withheld for taxesnot a buy/sell decision 4,213 shares $511.8K at $121.48 SEC filing ↗
  7. GILEAD SCIENCES, INC. GILD M Option exercise or conversionnot a buy/sell decisionreported at zero 8,779 shares $0 at $0.00 SEC filing ↗
  8. GILEAD SCIENCES, INC. GILD S Open-market sale × 3 15,000 shares $1.97M
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    1,038 $132.97 $138.0K SEC filing ↗
    3,062 $132.22 $404.9K SEC filing ↗
    10,900 $131.10 $1.43M SEC filing ↗
  9. GILEAD SCIENCES, INC. GILD S Open-market sale × 2 10,000 shares $1.29M
    The 2 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    3,050 $130.01 $396.5K SEC filing ↗
    6,950 $128.79 $895.1K SEC filing ↗
  10. GILEAD SCIENCES, INC. GILD S Open-market sale 10,000 shares $1.37M at $136.82 SEC filing ↗
  11. GILEAD SCIENCES, INC. GILD F Shares withheld for taxesnot a buy/sell decision 9,767 shares $1.45M at $148.56 SEC filing ↗
  12. GILEAD SCIENCES, INC. GILD M Option exercise or conversionnot a buy/sell decisionreported at zero 20,026 shares $0 at $0.00 SEC filing ↗
  13. GILEAD SCIENCES, INC. GILD S Open-market sale × 3 10,000 shares $1.45M
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    100 $145.71 $14.6K SEC filing ↗
    6,419 $145.18 $931.9K SEC filing ↗
    3,481 $144.04 $501.4K SEC filing ↗
  14. GILEAD SCIENCES, INC. GILD A Grant or awardnot a buy/sell decisionreported at zero 38,396 shares $0 at $0.00 SEC filing ↗
  15. GILEAD SCIENCES, INC. GILD S Open-market sale 115,640 shares $17.35M at $150.00 SEC filing ↗

Disclosed holdings

Shares is the amount on the form; value is that amount times the closing price shown. Rows with no closing price are left blank, so they may add up to less than the headline figure.

What is not counted here

Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.

Equity positions disclosed to the SEC, with the source filing behind each row.
Issuer Ticker Security Shares Close Value Form Reported Filing
GILEAD SCIENCES, INC. GILD Common Stock 642,567 $151.00 $97.0M 4 EDGAR ↗

Other insiders at the same companies

People who also file with the SEC at a company where Daniel Patrick O'Day reports shares.

Sharing a filing does not mean they work together day to day — it means both names appear on the same issuer’s insider record.

Sources

The filings linked in the tables above are the sources for every figure on this page.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Profile record last refreshed Sep 8, 2026.